I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
grazes graces crazes greases grasses crazies grazioso graecize crozes crases grosze gorses grecize grouses creases grosses griseous gracioso gracious curacies grosz cuirasses groszy cruses coriaceous crises curses cruces crasis krises corses carses cresses carices creeses crosses courses coerces coryzas kerseys cruises caresses carouses karosses
brazes razes grazes crazes urases graces creases hydrases prezes greases crozes braces gyrases whereases frizzies brazas boreases frizes freezes erases breezes terrases terraces boraces razzes traces crazies furzes prizes prases razees phrases frizzes braizes ureases crases heroizes friezes hyraces races rases arrases charases
graze craze crazy grace grass grassy grays grease greasy